Performance Analysis of a Hybrid Solar Photovoltaic- Grid Water Pumping System

This study examines the integration of grid and solar energy resources in remote water pumping systems to improve performance and reliability. The feasibility of a hybrid solar PV-grid system is investigated to assess its technical and financial performance compared to standalone solar PV or grid systems. A unique aspect of this hybrid system is the utilization of a water storage tank instead of energy storage for solar PV conversion. The system comprises a PV array, inverter, AC motor, submersible pump, storage tank, grid supply, and control systems. The paper presents a cost-effectiveness analysis using Net Present Value (NPV), Levelized Cost of Energy (LCOE), and Internal Rate of Return (IRR) to economically evaluate the power supply for pumping systems in community areas. The study focuses on two energy supply systems: solar photovoltaic systems and the grid network. A case study is conducted in the western region of Uganda, where the pumping systems are designed to provide water for residential, commercial, and small industrial usage. To evaluate the proposed solar PV system, Matlab/Simulink software is utilized for modeling, and simulations are performed to assess the system's performance and outcomes. Overall, this research aims to explore the benefits and drawbacks of integrating grid and solar resources in water pumping systems, with a particular emphasis on the economic viability and technical feasibility of a hybrid solar PV-grid system.